Worth snyder



C. V. ROTE.

GAR BRAKE.

(No Model.)

2 Sheets-Sheet 2.

(No Model.)

C. V. ROTE.

GAR BRAKE.

Patented July 16, 1889.

N. PETERS. mw www. wur.

UNITED STATES PATENT OFFICE.

CHARLES VICTOR ROTE, OF LANCASTER,l PENNSYLVANIA, ASSIGNOR OF PART TO BERNARD J. MCGRANN, EUGENE G. SMITH, AND ELMER ELLS VORTH SNYDER, OF SAME PLACE.

CAR-BRAKE.

SPECIFICATION forming part Of Letters Patent N0. 406,958, dated July 16, 1889.

Application filed November 9, 1888. Serial No. 290,374. ((No model.)

To all whom, it may concern,.-

Be it known that I, (.lHARLEs VICTOR ROTE, a citizen of the United States, and a resident of Lancaster, county of Lancaster, and State of Pennsylvania, have invented a new and useful Improvement in (lar-Brakes, of which the following` is a full, clear, and exact description, reference being had to the accompanying drawings, making part of this speciio iication.

y invention relates to means for utilizing the friction of the brake-shoe upon the wheel after the brake has been applied, foi-increasing the pressure of said shoe on the wheel,

i5 an'd its consequent power as abrake, and will be fully understood from the following description and claims, reference being had to thc accompanying drawings, in which-d Figure l represents enough of a ear-truck 2o or locomotive-driif'er to show my improvement applied thereto in side elevation. Fig. 2 represents a vertical section at right angles to Fig. l, showing the parts in end or edge view. Fig. 5 is a perspective view of the 2 5 cranked rock-shaft and parts coil'nected therewith, and Fig. l represents a section through said shaft.

The brake shown in the drawings is of that type or form known as a driver-brake,and

3o A thereon indicates a portion of the frame of the engine or truck, and D and ll two of the adjacent wheels thereof; A, a plate or upright secured to the frame A, and forming a support Vfor brackets and parts of the brake 3 5 mechanism hereinafter referred to.

C indicates an air or steam cylinder, snpported on the engine or truck frame in any usual or preferred manner.

D and D indicate the brake-shoes susio pended on rods (l and (17; E and E', camblocks or eccentric-lever castings, through which the brake-slices are operated, and which are pivoted at theirouter ends, either directly or through suitable lever extensions or arms, to the outer faces of the brake-shoes D and D at e and c', one to each shoe, as shown. The adjacent ends of these cam-blocksE and E are pivetally connected to the lower ends of links C2 and O", the upper ends of which are pivoted to the ends of a cross-head O1 on 5o the lower end of a piston-rod O', which at its upper end connects with a piston moving in the cylinder C and operated in any usual or preferred manner. The parts of the brake mechanism thus far described are well known 5 5 and in common use, and maybe of any usual or preferred construction 'and arrangement, except in details, which will be specified.

F indicates a rock-shaft, mounted in suitable bearings in brackets g g, attached to the 6o frame or plate A', and provided at its ends with oppositely-arran ged crank-arms f and f to suitable crank-pins, at the ends of which the upper ends of the brake-shoe suspensionrods d and d are attached, instead of being attached to and supported directly from the machine-frame, as is the usual manner. By this arrangement 4of the supports for the brakeeshoes instead of the shoes being held rigidly when thrown against the wheels by 7c the movement of the adjacent faces of the latter in opposite directions one shoe will be drawn downward and the other willbc thrust upward by the action of the wheels thereon, and thismovement of the shoe serves, through the arms j" and f, to rock the shaft F in its bearings. This movement is produced by the action of the piston-rod C in drawing the cam-blocks .E and E upward and thereby thrusting the brake-shoes against the wheels 8o in the usual manner.

The shaft F has a chain or chains 71., Wrapping it at or near the center of its length, the ends of which are connected to the upper end of a pendent rod or bar ll, (see Fig, 3,) the arrangement being such that the rocking of the shaft F in either direction will cause the chain to wind up on the shaft on one side or the other and so to lift the bar H. For preventing the accidental lifting of the 9o bar by the. action of the cani-blocks E and E', or other cause, the shaft F has a heart-shaped or other suitable cam f2 applied to it adjacent to the chain 7L and the point of which rests on a shoulder or projection 7L on the 95 upper end of the bar ll and prevents the latter from being raised until by the rocking of the shaft F in the 'manner explained the point of the cam is rocked to one side of the shoulder 7L', and so permits the bar II to rise.

The bar II extends down between the ad-4 jacent faces of the cam-blocks E andE, and when the latter are drawn upward by the movement of the piston in the cylinder C, for throwing the brake-shoes against the wheels, they clamp the bar I-I between them. At the same time the arms ff rock the cam f2 out of the way of the bar H, and the latter being drawn upward by the chain h the cam-blocks E and E are further drawn upward with it and serve to crowd the brake-shoes outward away from each other and against the wheels B and B with greatly increased and increasing force in a manner that will be readily understood.

The length of the arms fand f', as compared with the radius of shaft F, acting as a lever to lift the bar II, may be as three or four (more or less) to one, according to the power desired for lifting said bar and the amount of lift required.

By the arrangement described after the first application of the brakes to the wheels, and which may be made by any usual arrangement of means for the purpose, the friction of the brake shoes themselves is made to continue such application and to give greatly-increased force thereto.

It will be apparent that the form and arrangement of the parts may be greatly varied from those shown, and I therefore do not wish to be restricted to such specific form and arrangement, so long as substantially the means described are employed to attain the results specified.

Having now described my invention, I claim as newl. The combination, with the brake-shoes and the cam blocks or levers forthrowingthe 3. The combination, with the brake-shoes and their actuating cam-blocks, of the links or rods and rock-shaft on which said brakeshoes are suspended, and the bar interposed between the cam-blocks and connected with and operated from the brake-shoes, substantially as described.

4. The combination, with the brake-shoes and the mechanism for throwing the same into engagement with the wheels, of a rockshaft and rods connected therewith for upholding said shoes, and a sliding bar actuated by the frictional engagement of the shoes to increase the pressure of the brakeshoes 'on the wheels, also connected with said rock-shaft, substantially as described.

5. The combination, vwith the brake-shoes and their actuating cam blocks or levers, of the suspending-rods and the rock-shaft to which said rods are connected, the bar interposed between the cam-blocks and connected with and operated from the rock-shaft, as described.

In testimony whereof I have hereunto set my hand this 9th day of November, A. D. 1888.

CHARLES VICTOR ROTE.

litnessesz EUGENE G. SMITH, GEo. T. SMALLwooD. 

